Has anybody experimented with using OpenGL views inside an overlay window. I’m thinking this could be an interesting way to add effects to Cocoa based views/windows?

I’ll give it a try but before I do I was wonder if anybody else has tried?

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I’ve used overlay windows successfully on top of a QTMovieView. If you want the overlay window to be properly transparent, make sure that:

• your window isn’t opaque, i.e. [window setOpaque:NO], and
• Set the OpenGL context to also be non-opaque, which you can do by adding the following code snippet into your -prepareOpenGL method:

const long opaqueValue = 0; self openGLContext] setValues:&opaqueValue forParameter:[[NSOpenGLCPSurfaceOpacity];

–AndrePang

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Thanks Andre. When I finally get around to trying this I’m sure it will come in handy. Thanks again.